Finnish manufacturer Wärtsilä introduced an engine back in 2015 that was so good, it snagged a Guinness World Records title for being the most efficient four-stroke diesel engine shortly after its ...

The Toyota Corolla and Hyundai Elantra are both remarkably fuel-efficient, but one small sedan beats them both when it comes to delivering the best MPG performance from a non-hybrid four-cylinder ...

Back in the Malaise era during the 1970s and early '80s, before imports like the Toyota Camry really took over the market, diesel-powered engines seemed like the way forward for American vehicles.

Speed feels powerful on the open road, but it quietly drains the fuel tank faster than most drivers expect. Every car reaches ...

Most V8 fans accept the fact that choosing a vehicle with such an engine means higher gas bills and overall running costs. As addictive as a V8 roar is, boosted and/or hybridized six-cylinder ...

Geely’s record hybrid proves HEVs can beat PHEVs – lighter, simpler, and ultra-efficient, delivering 106 mpg without the added weight and complexity of plug-ins. Geely’s i-HEV sets a Guinness record ...

Despite its critics and moves toward electrification, the internal combustion engine is not yet dead. Though its design for passenger vehicles may have begun to reach its apex with Mazda’s Skyactiv ...

Every car here has a classic V8 soundtrack but can be fairly efficient with a light foot. Most V8 fans accept the fact that choosing a vehicle with such an engine means higher gas bills and overall ...